Residents are advised to use caution as conditions warrant. People with heart or lung diseases should follow their doctors advice for dealing with episodes of unhealthy air quality.

Older adults and children should avoid prolonged exposure, strenuous activities or heavy exertion as conditions dictate.

For more information, call the Tuolumne County Air District at 209-533-5693.

Additionally, according to the National Weather Service, there will be a daily threat of afternoon and evening thunderstorms in the Sierra Nevada through Monday.

The primary threat from these storms will be cloud-to-ground lightning, gusty and erratic winds and locally heavy rainfall which could cause rises in creeks and streams and possible localized flooding of mountain roads.